The most likely optional lock components to end up in a Stasis deck will be artifacts, as there are many excellent options
If a card with suspend is in your hand, any time you could cast it, you may pay its suspend cost and exile it with the specified number of time counters on it
It lets you fetch protection spells at instant speed to safeguard your board or commander
If you are mostly in red, a Volcanic Island here and a Rakdos Signet there will set you up to take that third-pack Time Walk or Mind Twist with reasonable confidence that you can cast it
That can take a lot of different forms, like discarding your own cards, making your opponents discard, or benefitting you when players are left empty-handed
The commander we designed to support one of our mechanical themes (Simic plus Abzan equals GWUB +1/+1 counters) spoke to Ben on a more fundamental level than the other commanders did